<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>

<body>
    <div id="app">
        <!-- 数据与方法 -->


        {{message}}
    </div>
    <script>
        var data = { message: "helloworldd"}
        var app = new Vue({
            el: "#app",
            data: data
        })
        data.message = 'sb'
        app.message = 'sbbb'

    </script>
</body>

</html>